2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/95510The study of ageing phenomena leads to the investigation of a maximal parabolic subalgebra of conf_3 which we call alt. We investigate its Lie structure, prove some results concerning its representations and characterize the related Appell systems.Latex2e 8 pages; Proceedings of the Levico workshop on quantum probabilityAnalysis of PDEsStatistical MechanicsHigh Energy Physics - TheoryMathematical Physicstext